Klaus Praefcke

This inventor holds 9 USPTO granted patents. Top assignees: Merck Patent Gesellschaft MIT Beschrankter Haftung, Ciba Specialty Chemicals Corporation. Active years: 1983-1999.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Klaus Praefcke. Retrieved from https://idiyas.com/inventor/klaus-praefcke

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Calculating rank

USPTO Granted Patents = 9

% Patents Active = 100.0

Average Co-Inventor Count = 3.6

ph-index = 7

Forward Citations = 119(Granted Patents)

Company Filing History:

8 out of 1,248

Merck Patent Gesellschaft MIT Beschrankter Haftung

patents

1 out of 1,524

Ciba Specialty Chemicals Corporation

patents

Years Active: 1983-1999

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9 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5969154 - Liquid crystalline diketopyrrolopyrroles (1999-10-19),

2. 4894181 - Carbocyclic compounds (1990-01-16),

3. 4877220 - Hexasubstituted cyclohexane compounds (1989-10-31),

4. 4758373 - Carbocyclic compounds (1988-07-19),

5. 4734522 - Carbocyclic six-membered ring compounds (1988-03-29),

6. 4713196 - Polymer compositions exhibiting liquid-crystalline phases (1987-12-15),

7. 4631143 - Triphenylene derivatives (1986-12-23),

8. 4578210 - Carbocyclic six-membered ring compounds (1986-03-25),

9. 4419263 - Liquid crystalline cyclohexylcarbonitrile derivatives (1983-12-06),

Profile summary based on public USPTO records.

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]